Jefferson County, Colorado
Jefferson County is a county in Colorado with an estimated population of 576,366 in 2023. 7 cities, towns and Census places in it are indexed here.
Largest places in Jefferson County
Lakewood 155,961Arvada 121,414Wheat Ridge 31,804Golden 20,242Edgewater 4,882Mountain View 519Morrison 388
About Jefferson County
Jefferson County is one of the counties of Colorado. County governments in Colorado handle local services such as courts, property records and elections; cities and towns inside the county run their own municipal services. Population figures come from the Census Bureau's Vintage 2023 estimates, which are updated annually.